<template>
    <div>
        <!--面包屑导航-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!--卡片视图-->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!--角色列表区域-->
            <el-table :data="rolesList" border stripe>
                <!--下拉列表-->
                <el-table-column type="expand">
                    <template slot-scope="test">
                        <el-row :class="['vcenter','bdbottom', i1===0 ? 'bdtop': '']" v-for="(item1,i1) in test.row.children" :key="item1.id">
                            <el-col :span="5" >
                                <el-tag closable @close="removeRightById(test.row,item1.id)" >{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <el-row :class="['vcenter',i2===0 ? '': 'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable @close="removeRightById(test.row,item2.id)"  type="success" >{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag closable @close="removeRightById(test.row,item3.id)" type="warning" v-for="(item3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button @click="showSetRightDialog(scope.row)" size="mini" type="warning" icon="el-icon-setting">分配权限</el-button>
                    </template>
                </el-table-column>

            </el-table>

        </el-card>


        <!--分配权限的对话框-->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
            <el-tree
                :data="rightsList"
                :props="treeProps"
                show-checkbox="show-checkbox"
                node-key="id"
                default-expand-all="default-expand-all"
                :default-checked-keys="defKeys"
                @close="setRightDialogClosed"
                ref="treeRef"
                >
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible=false">取消</el-button>
                <el-button type="primary" @click="allotRights">确定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "Roles",
        created(){
            this.getRolesList();
        },
        data(){
            return {
                // 当前正在操作的角色id
                roleId:'',
                rolesList:[],
                // 设置 控制分配权限对话框的显示与隐藏
                setRightDialogVisible:false,
                rightsList:[],
                // 属性控件的属性绑定对象
                treeProps:{
                    label:'authName',
                    children:'children',
                },
                // 默认选中的id
                defKeys:[]
            }
        },
        methods:{
            async getRolesList(){
                const {data:res} = await this.$http.get('roles');
                if(res.meta.status!==200){
                    return this.$message.error('获取角色列表失败');
                }
                this.rolesList=res.data;
            },
            async removeRightById(role,rightId){
                const resultText=await this.$confirm(
                    '此操作将永久山删除该权限，是否继续？',
                    '提示',
                    {
                        confirmButtonText:'确定',
                        cancelButtonText:'取消',
                        type:'warning'
                    }
                ).catch(err =>{
                    return err
                });
                if(resultText === 'confirm'){
                    const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
                    if(res.meta.status === 200){
                        this.$message.success('删除成功');
                        role.children = res.data;
                    }else{
                        this.$message.error('删除权限失败');
                    }
                }
            },
            async showSetRightDialog(role){

                this.roleId = role.id;
                // 获取所有权限的数据
                const {data:res} = await this.$http.get('rights/tree');
                if(res.meta.status !== 200){
                    return this.$message.error('获取权限失败');
                }
                this.rightsList = res.data;
                console.log(this.rightsList);
                // 递归获取三级节点的id
                this.getLeafKeys(role,this.defKeys);
                this.setRightDialogVisible=true;
            },
            // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defkeys 数组中
            getLeafKeys(node, arr){
                if(node.children){
                    // 递推
                    node.children.forEach(item => {
                        this.getLeafKeys(item,arr);
                    })
                }else{
                    // 如果当前node节点是叶子节点，则是三级节点
                    return arr.push(node.id);
                }
            },
            // 监听分配权限对话框的关闭事件
            setRightDialogClosed(){
                this.defKeys=[]
            },
            async allotRights(){
                const keys=[...this.$refs.treeRef.getCheckedKeys(), this.$refs.treeRef.getHalfCheckedKeys()];
                const idStr = keys.join(',');
                const {data:res}  = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr});
                if(res.meta.status!==200){
                    return this.$message.error('分配权限失败');
                }
                this.$message.success('分配权限成功');
                this.getRolesList();
                this.setRightDialogVisible=false;
            }
        }
    }
</script>

<style scoped>

</style>